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Mathbox for Alexander van der Vekens |
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Mirrors > Home > MPE Home > Th. List > Mathboxes > 2reu7 | Structured version Visualization version Unicode version |
Description: Two equivalent expressions for double restricted existential uniqueness, analogous to 2eu7 2559. (Contributed by Alexander van der Vekens, 2-Jul-2017.) |
Ref | Expression |
---|---|
2reu7 |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | nfcv 2764 |
. . . 4
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2 | nfre1 3005 |
. . . 4
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3 | 1, 2 | nfreu 3114 |
. . 3
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4 | 3 | reuan 41180 |
. 2
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5 | ancom 466 |
. . . . 5
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6 | 5 | reubii 3128 |
. . . 4
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7 | nfre1 3005 |
. . . . 5
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8 | 7 | reuan 41180 |
. . . 4
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9 | ancom 466 |
. . . 4
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10 | 6, 8, 9 | 3bitri 286 |
. . 3
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11 | 10 | reubii 3128 |
. 2
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12 | ancom 466 |
. 2
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13 | 4, 11, 12 | 3bitr4ri 293 |
1
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Colors of variables: wff setvar class |
Syntax hints: ![]() ![]() ![]() ![]() |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1722 ax-4 1737 ax-5 1839 ax-6 1888 ax-7 1935 ax-9 1999 ax-10 2019 ax-11 2034 ax-12 2047 ax-13 2246 ax-ext 2602 |
This theorem depends on definitions: df-bi 197 df-or 385 df-an 386 df-tru 1486 df-ex 1705 df-nf 1710 df-eu 2474 df-mo 2475 df-cleq 2615 df-clel 2618 df-nfc 2753 df-ral 2917 df-rex 2918 df-reu 2919 df-rmo 2920 |
This theorem is referenced by: 2reu8 41192 |
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